An explosive field of electrical energy erupts from your body, spreading out 25 feet in all directions. Targets caught in the field must make a Constitution saving throw, taking 4d8 Lightning damage on a failed save, or half as much on a successful one. Additionally, creatures who fail the saving throw are stunned until the end of their next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the electrical damage increases by an additional 1d8.